O-hydroxyalkylation of 1,1-dihydroperfluorinated alcohols
申请人:Minnesota Mining and Manufacturing Company
公开号:US04906792A1
公开(公告)日:1990-03-06
Mono O-hydroxyalkylated derivatives of 1,1-dihydroperfluorinated alcohols are prepared by reaction the alcohols with alkylene carbonates. The O-hydroxyalkylated derivatives are useful non-ionic surfactants and emulsifiable compounds for fire extinguishing systems.
O-Hydroxyalkylation of 1,1,-dihydro fluorinated alcohols
申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0518534A1
公开(公告)日:1992-12-16
Mono O-hydroxyalkylated derivatives of 1,1-dihydroperfluorinated or 1H,1-alkylperfluorinated alcohols are prepared by reacting the alcohols with alkylene carbonates at a temperature of at least 60°C in the presence of a one- or two-part catalyst. The catalyst is a nitrogenous base, optionally in combination with a tetraalkylammonium halide. The O-hydroxyalkylated derivatives are useful non-ionic surfactants and emulsifiable compounds for fire extinguishing systems.
A convenient transformation of 1,1-dihydroperfluorinated alcohols into O-hydroxyethyl derivatives (RFCH2OCH2CH2OH) is described in which ethylene carbonate is utilized as the alkylating agent. Tetraalkylammonium iodides and trialkylamines are effective catalysts.
HELLMANN, STEVEN M.;KREPSKI, LARRY R.;MOREN, DEAN M.;RASMUSSEN, JERALD K.
作者:HELLMANN, STEVEN M.、KREPSKI, LARRY R.、MOREN, DEAN M.、RASMUSSEN, JERALD K.
DOI:——
日期:——
LIQUID CRYSTAL COMPOUNDS HAVING PERFLUOROETHER TERMINAL PORTIONS